Jack Kilby's first successful invention of the integrated circuit is a transistor, a number of resistors and a capacitor embedded in a piece of germanium less than a half-foot-long piece of steel. Either measure Fairchild products, this device can only be described as rough, but the oscilloscope screen has shown this IC can indeed work. Jack Kilby often quipped, can actually be used first if he knew his invention of the integrated circuit has been used in the next 40 years, he would "put it designed to be a little beauty." Generation after generation of electrical engineers completed his this desire, and future successor will continue his original design becomes more perfect. But back in 1958, what is the technical elements to help Jack Kilby its rough design idea into reality from it? As early as nine years ago, Bell Labs invented the transistor, thereby opening the door to progress in semiconductor electronics. Bell transistors instead of the previous volume, high cost, fragile and large power vacuum. The mid-1950s, began to appear in the transistor consumer products and military applications. However, there are weaknesses in the transistor itself. Some applications will require thousands of transistors and tens of thousands of the same conventional elements connected together by hand, thus constituting the circuit. This work is not only time-consuming, costly and reliability is also worrying. In addition, there is another problem Transistor Fairchild, the engineer called the issue "Digital violence", the absolute number of transistors and other devices that are connected in a circuit system will lead to stagnation transistor applications. Its size and weight also tend to make them run on many devices can not include military applications in the air. As long as a component problem, then the whole system will be completely paralyzed. Formerly known phototransistor phototransistor. Phototransistor is irradiated by the light intensity to control the current of the device. Oh it as a photodiode equivalent combination with a transistor, so it is amplified Nanjing Fairchild agents, detection phototransistor can check Fairchild diode from the appearance near the pipe key (raised) or longer A pin is the emitter e, far away from the tube or shorter another key pin is the collector c. Monitoring Methods: wrap the pipe with a black cloth, with a multimeter R × 1 kΩ stalls, two pen, the reverse of each measuring two pins once were measured resistance should be infinite. For NPN type tube, red pen then the emitter e, black pen then collector c, remove the shade cloth, then hands should be deflected to the right, the resistance to deflection by infinite resistance in the direction of small to around 15 ~ 35 kΩ, then the phototransistor is normal. Deflection angle, the higher the sensitivity. If the hands are still no deflection at infinity or zero resistance, indicating that the tube has an open or short circuit damage. Fairchild Semiconductor Nanjing, Nanjing Fairchild, 耀坤 technology provided by Nanjing 耀坤 Technology Limited. Nanjing 耀坤 Ltd. (www.njykkj.com) strong, credible, in Nanjing, Jiangsu diode industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yaokun into the brilliant technology and you work for a better future!